U.S. to end all waivers on imports of Iranian oil, crude price jumps

FILE PHOTO: A gas flare on an oil production platform in the Soroush oil fields is seen alongside an Iranian flag in the Persian Gulf, Iran, July 25, 2005. REUTERS/Raheb Homavandi/File Photo/File Photo

WASHINGTON (Reuters) - The United States on Monday demanded that buyers of Iranian oil stop purchases by May 1 or face sanctions, a move to choke off Tehran's oil revenues which sent crude prices to six-month highs on fears of a potential supply crunch.

The Trump administration on Monday said it will not renew exemptions granted last year to buyers of Iranian oil, a more stringent than expected decision that caught several key importers who have been pleading with Washington to continue buying Iranian oil sanctions-free.